Scaffold-binder



finira TATES JOSEPH A. MOROSS, OF DETROIT, MICHIGAN.

SCAFFOLD-BINDER.

SPECIFICATION forming part of Letters Patent No. 326,514, datedSeptember 15, 1885.

Application filed October 29, 1884.

To all whom it may concern,

Be it known that I, JOSEPH A. MoRoss, of Detroit, county of Wayne, Stateof Michigan, have invented a new and useful Improvement inScaffold-Binders; and I declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it pertains to make and use it,l reference being hadto the accompanying drawings, Which form a part of this specification.

My invention consists in the combinations of' devices and appliances,hereinafter described, and more kparticularly pointed out in the claims.

My invention relates to improvements in scaffold binders or clamps, andis designed to provide a novel binder, simple in its construction, whichmay be readily applied and changed, and which shall effectually bind theposts and the ledgers77 together, so as to be absolutely safe and strongwithout liability of slipping and accidental disengagement and capableof supporting any desired weight.

The invention is illustrated by the accompanying drawings, in whichFigure l is a side elevation illustrating my invention. Fig. 2is ahorizontal section ofthe same. Fig. 3 is a separate View of the device.Fig. 4is a modiiication. Fig.5is another modification. Fig. 6 is aperspective.

A represents a ledger of the scaffold; B, the posts or poles; O, theyoke of my improved clamp, adapted to be located about the post andledger, as shown in Fig. vl, said yoke be ing made of a single solid barof round or square metal, having its ends bent at a suitable anglethereto. D is the clamping-bar, constructed of round or squaremetal,with eyes to receive the ends of the yoke.

The ends of the yoke, if made of roundiron, are screw-cut, as shown inFigs. 3 and 4. E

and E are thumb-nuts located upon the ends of the yoke, adapted andarranged to force the clamping-bar against the ledger or post, as thecase'may be, and to tighten the yoke and bar firmly thereon.

Instead of screw cutting the ends of the yoke they may be constructedwith oneor more orifices, c, adapted to receive a wedge-shaped key, F,whereby the yoke and bar are clamped (No model.)

C may be similarly toothed or serrated, the

object being to provide for the firm engagement of the barand yoke withthe timber in erecting the scaffold. Between the clampingbar D and theupright B, Iarrange ashoe, G,

- and, as here shown, between the yoke O and the ledger A,I arrange asimilar shoe, G, the shoes being preferably toothed or serrated on theirinner faces to firmly engage the ledger and the upright. These shoesprovide for a firm and substantial grip when it is desired to erect thescaffold for sustaining` very heavy weights, which grip is rendered mosteffectual by the teeth of the shoes penetrating and engaging the ledgerA and the upright B, thereby positively preventing the timbers fromslipping. The shoe G/ is grooved to receive the clamping-bar, therebyadding to the security of the scaffold in preventing slipping of thebinding devices.

It Will be seen that by my invention I provide for erecting a scaffoldwithout perforating or boring holesinto or through any of the timbers,which is very important, in order that the timbers be not weakened byholes. The cost of erecting a scaffold is reduced by my invention, whichis due to the simplicity of the devices used, and the fact that noboring of the timbers is demanded. Ordinarily scaffolds are made ofpine, and frequently they are required to stand exposed to the Weather.If bolt-holes are made in the timbers, as ordinarily, they are not onlyweakened, but Water will work into the timber, thereby causing them torapidly rot and endangering the safety of the scaffold. Such seriousobjections are avoided by my invention, and I further avoid thenecessity of bracing or staying the scaffold by the use of extraneouscontrivances.

What I claim is- 1. A scaffold-binder consisting of a yoke having itsends bent to form end arms, acrossbar constructed to receive and connectsaid end arms, binding devices engaged upon said end arms to hold andadjust said cross-bar upon said arms, and a shoe grooved to receive IOOthe cross-bar to t inside the same, substantially as described.

2. rlhe combination, with the ledger Aand upright B, of a yoke havingits ends bent to form end arms, a cross-bar constructed to receive andconnect said end arms, and a binding device engaged upon each of saidend arms to hold and adjust said bar upon said arms, the constructionbeing such that the ledger and the upright may be embraced bysaid yokeand cross-bar and held firmly together by the adjustment of the bar uponsaid arms by said binding devices, substantially as described.

3. A scaiold-binder consisting of a yoke having its ends bent to formend arms, a crossbar constructed to receive and connect said arms, abinding device engaged upon each of Said arms to adjust and hold thecross-bar thereon, a shoe, G', grooved to receive the crossbar, and atoothed or serrated shoe, G,

constructed and arranged substantially as described.

4. The coinbination,with a 1edger,A,and an upright, B, of a yoke havingits ends bent to form end arms, a cross-bar constructed to receive andconnect said arms, binding devices engaged upon said end arms to holdand adj ust said cross-bar thereon, and one or more shoes, theconstruction and arrangement being such that the ledger and the uprightmay be embraced by said yoke and cross-bar with intervening shoe and beheld firmly together by the adjustment of said binding devices upon theend arms, substantially as described.

In testimony whereof I si gn this specification in the presence of twowitnesses.

JOSEPH A. MOROSS.

Witnesses:

N .t S. WRIGHT, M. B.' ODOUGHERTY.

